1 /*-
2 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/11.0/sys/arm/include/counter.h 269406 2014-08-01 23:06:38Z ian $
27 */
28
29 #ifndef __MACHINE_COUNTER_H__
30 #define __MACHINE_COUNTER_H__
31
32 #include <sys/pcpu.h>
33 #include <machine/atomic.h>
34 #ifdef INVARIANTS
35 #include <sys/proc.h>
36 #endif
37
38 #define counter_enter() critical_enter()
39 #define counter_exit() critical_exit()
40
41 #ifdef IN_SUBR_COUNTER_C
42
43 static inline uint64_t
44 counter_u64_read_one(uint64_t *p, int cpu)
45 {
46
47 return (atomic_load_64((uint64_t *)((char *)p + sizeof(struct pcpu) *
48 cpu)));
49 }
50
51 static inline uint64_t
52 counter_u64_fetch_inline(uint64_t *p)
53 {
54 uint64_t r;
55 int i;
56
57 r = 0;
58 for (i = 0; i < mp_ncpus; i++)
59 r += counter_u64_read_one((uint64_t *)p, i);
60
61 return (r);
62 }
63
64 static void
65 counter_u64_zero_one_cpu(void *arg)
66 {
67
68 atomic_store_64((uint64_t *)((char *)arg + sizeof(struct pcpu) *
69 PCPU_GET(cpuid)), 0);
70 }
71
72 static inline void
73 counter_u64_zero_inline(counter_u64_t c)
74 {
75
76 smp_rendezvous(smp_no_rendevous_barrier, counter_u64_zero_one_cpu,
77 smp_no_rendevous_barrier, c);
78 }
79 #endif
80
81 #define counter_u64_add_protected(c, inc) do { \
82 CRITICAL_ASSERT(curthread); \
83 atomic_add_64((uint64_t *)zpcpu_get(c), (inc)); \
84 } while (0)
85
86 static inline void
87 counter_u64_add(counter_u64_t c, int64_t inc)
88 {
89
90 counter_enter();
91 counter_u64_add_protected(c, inc);
92 counter_exit();
93 }
94
95 #endif /* ! __MACHINE_COUNTER_H__ */
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